Restructure omni services and add Chatwoot research snapshot

research/chatwoot/app/javascript/dashboard/api/specs/campaign.spec.js

@@ -0,0 +1,13 @@
+import campaigns from '../campaigns';
+import ApiClient from '../ApiClient';
+
+describe('#CampaignAPI', () => {
+  it('creates correct instance', () => {
+    expect(campaigns).toBeInstanceOf(ApiClient);
+    expect(campaigns).toHaveProperty('get');
+    expect(campaigns).toHaveProperty('show');
+    expect(campaigns).toHaveProperty('create');
+    expect(campaigns).toHaveProperty('update');
+    expect(campaigns).toHaveProperty('delete');
+  });
+});